PAILA KRISHNA REDDY; MAYURI ODELA; V.SANDHYA RANI. ARTICLE ON DISCRETE MATHEMATICS. INTERNATIONAL JOURNAL OF MANAGEMENT RESEARCH AND REVIEW, India, v. 8, n. 4, p. 01–5, 2018. Disponível em: https://ijmrr.com/index.php/ijmrr/article/view/547. Acesso em: 17 sep. 2026.